Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

Personal narrative of travels to the equinoctial regions of the New continent, during the years 1799-1804 / Printed for Longman [etc.], 1818-1829./Alexander von Humboldt; Aimé Bonpland; Helen Maria Williams; New York : AMS Press, 1966.